T-Mobile Galaxy S II - Black spot behind Camera Lens?

For some strange reason, there appears to be a black spot behind my camera lens. Every time I zoom up on a photo, its still there. And I even tried cleaning the lens itself, and it didnt work. I honestly think that it's dust behind the lens, but im not sure. It could possibly be a dent. Its very disorienting, and this appears on all photos I take.